Pirelli has insisted that its tires for the 2014 Formula One World Championship are safe following a Twitter report from Mercedes driver Nico Rosberg that he suffered a high-speed blowout during the final day of this week’s tire test in Bahrain.

Before deleting it from his account (possibly due to influence from either Pirelli or Mercedes), Rosberg’s missive read: “Just spun at full speed 320km/h on Bahrain straight because my tyre blew up without warning.thanks to that need to get some toilet paper now..”

Afterwards, Pirelli noted in a statement that the tire that failed on Rosberg’s car had yet to be tested on the track:

“The tyre tests in Bahrain regarded a number of prototypes, which were completely innovative in terms of structure and compounds, with the aim of developing the most suitable solutions for the next season. This morning, Nico Rosberg’s Mercedes was fitted with one of these prototypes, a tyre which had only been tested in the laboratory and which will not be proposed again. Thus, the safety of the tyres which will be supplied for the next championship is not in question. The accident which happened to Rosberg’s car is being investigated and the findings will be communicated to the FIA and the teams.”

Prior to Rosberg’s tweet, things had been quiet in terms of news regarding the test from Bahrain, which also included World Champions Red Bull (with reserve driver Sebastien Buemi), Ferrari (Pedro de la Rosa and Marussia racer Jules Bianchi) and Toro Rosso (2014 race drivers Jean-Eric Vergne and Daniil Kvyat).

The Bahrain test was meant to help Pirelli as it continues to prepare its tires in advance of major rules changes for the 2014 season. With multiple problems suffered this past year – including several tire failures during the British Grand Prix – Pirelli is doing all it can to avoid more disasters.